Edge-trimming machine.



Patented Ian. 23, I900.

C. G. BELMER.

EDGE TRIMMING MACHINE.

(Application filed Feb. 21, 1899.) (No Model.) 2 Sheets-Sheet 1,

5 INJEINTEIR:

No. 64!,822. Patented Jan. 23, I900. C. G. BELMER.

EDGE TRIMMING MACHINE.

(Application filed Feb. 21, 1599.

(No Model.) 2 Sheets-Sheet 2.

n4: NORRIS PzYzns 90.. PHOTO-LYING" WASNINGTON, n. c.

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CHARLES e. BELMER, or CHELSEA, MASSACHUSETTS.

EDGE-TRIMMING MACHINE;

streamli es forming art or Letters Patent 1%. 641,822, dated awa23,1906. Application as February 21, 1899- Serial in. 706,340. (Nomodel.)

To all whom it may concern.-

Be it known that I, CHARLES G. BEliMER, of Chelsea, in the county ofSufiolk and State of Massachusetts,have invented certain new and usefulImprovements in Edge-Trimming Machines, of which the following is aspecification.

' This invention has relation toro'tary edgetrimming machines forshaving or trimming the heel edges orotherparts of boots and shoes; andit has for its object to provide certain protective devices and otherimprovements tending to increase the efficiency of machines of thischaracter.

- The invention consists in the novel features of construction andarrangement which I shall now proceed to describe and claim. I

Of the accompanying drawings, forming a part of this specification,Figure 1 represents a side elevation of an edge-trimming machineconstructed in accordance with my invention. Fig. 2 represents aview,partly in plan and partly in section, on the line 2 2 of Fig. 1. Fig. 3represents a front end elevation of the machine. Fig. 4 represents anenlarged longitudinal sectional View of the buffer. Fig. 5 represents anenlarged sectional view of the cutter and the shield or counter guard atthe outer end thereof. Fig. 6 represents a side elevation looking at theopposite side of Fig. 1. Fig. 7 isa view similar to Fig. 3, illustratinga shoe in its position relative to the parts of the device while thetrimming operation is being performed.

The same reference characters indicate the same parts in all thefigures.

Referring to the drawings, a designates a frame having bearings for thecutter-shaft b, on which is a pulley b of the usual kind, said shafthaving a cutter attached to its forward end, which cutter is adapted tobe rotated at a high rate of speed to trim the heel edge or other partof the shoe.

a is a stationary support attached to or forming a part of the frame aand serving as a support for the bottom and edge rests now to bedescribed.

61 represents the bottom rest, of segmental or semi-annular form andhaving lugs d, to which are attached supporting and guiding legs or rods(:1 which project through guiding sockets or apertures in the support a.

.02 forward in a direction parallel to theshaft.

The forward motion of said rest is limited by means of a collar d whichis provided with a set-screw d having a knurled head, so that 'theoperator can screw and unscrew it with his fingers and set the collar 01in different positions on the leg (1 e is an edge-rest of segmentalform, having a segmental rib e occupying a groove 6 of correspondingcurvature formed in an edgerest holder 6, which is pivotally mounted ona stud e at the end of a post e, which projects from the face of thesupport a. The holder 6 may swing in and out to bring the end of theedge-rest e a greater or less distance from the periphery of the cuttero, and when adjusted is fixed in position by means of a nut 6 engaging afixed guide-plate a The guide-plate has a segmental slot concentric withthe stud e and is engaged on its rear side by the head of a threadedbolt e ,upon whose forward end the nut 6 screws. The edge-rest e isretained in place in its holder-e by means of an overlapping plate eattached by screws e e to the holder, and is arranged so that it can beyieldingly projected in its guide in the direction of the work by meansof a spring 6 engaging pins e and e", projecting from the re- 1taining-plate e and the rest 6, respectively. The movement of saidedge-rest is limited by means of a stop-pin e on the edge-rest abuttingthe end of a recess in the plate e as seen in Figs. 2 and 3. Theedge-rest may, however, be fixed in any desired position by means of aset-screw e passing through its holder e and engaging the edge of therest.

When the operator presents the edge of a shoe heel to the cutter, hepresses said edge radiallyinward against the blades of the cutter andguides the shoe by means of the bot tom and edge rests dand e. Thebottom rest at prevents the shoe from tipping sidewise and at the sametime presses the top or rand edge of theheel forward against therandcutting lip c on the cutter c. In shoes such as those havingspring-heels, where the thickness of the heel varies, the bottom rest 01yields rearwardly against its springs 61 when the thicker portions ofthe heel are reached. The shoe is also supported and guided during thetrimming operation by the edge-rest e. The said edge-rest, as stated,may be fixed by means of the screw e", so as to remain in a fixedposition; but when a skilled workman is using the trimmer he may loosenthe screw 6" and allow the edge-rest to follow the edge of the heel asthe latter moves around the cutter. \Vhen used in a fixed position, theedge-rest may be adjusted,as stated,so that it can be made convenientfor short or tall workmen.

An improvement in the present invention relates to the buffer f orfeather-edge trimmer, whose blades project between the blades of thecutter c and operate to trim off the feather edge or bur resulting fromthe action of the cutter c. Said buffer is provided with arearwardly-projecting sleevef,which loosely surrounds the shaft 1), andin its wall are formed through-slots f, occupied by hooks formed on theends of connector-bars f which lie neat the shaft 1) and have their rearends attached by pins f to a collar f. The latter looselysurrounds theshaft Z) and may be adj ustably fixed thereto by means of a set-screw fThe collar f and sleeve f are channeled to receive the bars f and thecollar is formed with a forwardly-projecting portion or shell 3, whichoverlaps the rear end of the sleeve f and incloses a springf". Thelatter is interposed between the rear end of the sleeve f and the end ofthe larger bore of the collar f and is located outside of the barsf asshown. The said spring operates to project the buffer yieldingly forwardin the direction of the work,and the hooked barsfiabutting against therear ends of the slotsf, serve to limit-the forward motion of saidbuffer. The normal position of the latter with respect to the cutter maybe varied by adjusting the collar f on the shaft. Theforwardly-projecting portion 3 of said collar incloses the spring f andprotects said spring from uncoiling or being otherwise displaced. A

It will be observed that the segmental bottom rest d is adapted toafford a yielding support for the bottom of the part to be trimmed,which support is in close proximity to the outer ends of thebuffer-blades f and extends partly around the series of blades, so thatthe heel is supported by the bottom rest close to the buffer-blades inall the positions required during the shaving or trimming operation. Thebottom rest materially aids the operator in holding the shoe in placeagainst the displacing tendency or pressure of the bufferblades. Theyielding movement of the bottom rest enables it to move in and outindependently of the bulfer-blades, the rest and blades at times movingsimultaneously in opposite directions.

As shown in Fig. 5, the shield or counterguard c at the outer end of thecutter c has a beveled annular face 0 on its inner side, which facesurrounds the outer ends of the rand-trimming portions 0 of thecutter-blades and has about the same inclination as said portions. Theobject of this beveled face 0 is to force the ragged corner of the randinwardly toward the cutting portions 0 cansing said portions to smoothlytrim the said corner.

I claim--.

1. In an edge-trimming machine, a rotary cutter, a stationary support, asegmental bottom rest partially surrounding the cutter and having a rodor leg guided in the said stationary support, a spring interposedbetween said support and the bottom rest and surrounding the said rod orleg, a collar working on said rod or leg behind the said support tolimit the forward movement of the bottom rest and a set-screw working insaid collar and designed to engage said rod or leg.

2. In an edge-trimming machine, a rotary cutter, a stationary support,and an edge-rest holder pivotally mounted on the stationary support atone side of the cutter, and an edgerest adjustably mounted on saidholder and arranged to swing toward and from the cutter in the planethereof.

3. In an edge-trimming machine, a rotary cutter, an ed ge-rest holderhavin ga segmental guide, means for adjusting said holder, and anedge-rest mounted in said segmental guide and adjustable on the holderconcentrically with the cutter.

4. In an edge-trimming machine, a rotary cutter, an edge-rest holderhavinga segmental guide, means for adjusting said holder, an edge-restmounted on the guide of said holder and movable concentrically with thecutter, and a spring adapted to hold the edge-rest yieldingly againstthe work.

5. In an edge-trimming machine, a rotary cutter, an edge-rest holderhaving a segmental guide, an edge-rest mounted in the guide of saidholder and movable concentrically with the cutter, and a set-screw forfixing the edge-rest at different adjustments on the holder.

6. In an edge-trimming machine, asupporting-frame, a rotary cuttermounted therein, an edge-rest holder carried by said frame and having asegmental groove therein, and an edge-rest carried by said holder andhaving a rib fitting within said segmental groove, substantially as setforth.

7. In an edge-trimming machine, a supporting-frame, a rotary cuttermounted therein, an edge-rest holder pivotally mounted on said frame,said holder having a slot formed therein concentric with its pivot, athreaded bolt working in said slot, a nut working on said bolt anddesigned to engage said holder, and an edge-rest carried by said holder,substantially as set forth.

8. In an edge-trimming machine, a rotary cutter, an edge-rest holdermounted adjacent thereto, an edge-rest, and an overlapping platedesigned to retain said edge-rest' in position on said holder, as setforth.

9. In an edge-trimming machine, a rotary cutter, an edge-rest holdermounted adjacent ICC thereto, an edge-rest, an overlapping plate securedto said holder and designed to retain said edge-rest in position, and aspring carried by said plate and engaging studs on the latter and saidholder, substantially as set forth.

10. In an edge-trimming machine, a rotary cutter, an edge-rest holdermounted adjacent thereto, an edge-rest, a plate secured to said holderand designed to retain said edge-rest in position, said plate having aslot therein, and a pin carried by said edge rest and working in theslot of said plate, substantially as set forth.

11. In an edge-trimming machine, a rotary shaft, a cutter mountedthereon, a longitudinally-slotted sleeve mounted on said shaft v andhaving forwardly-extended buffer-blades projecting between the blades ofthe cutter, said sleeve having channeled portions adjacent the slotsthereof, a collar surrounding said shaft and also provided withchanneled portions, means for adjustably fixing said collar to saidshaft, connecting-bars secured to said collar and fitting within saidchanneled portions, said bars having hooks at their forward endsoccupying the slots of said sleeve and normally abutting the rear endsthereof, and a spring located within said buffer-sleeve and interposed,between the same and said collar, said spring surrounding the shaftoutside of said connecting-bars, substantially as set forth.

In testimony whereof I have affixed my signature in presence of twowitnesses.

CHARLES e. BELMER,

Witnesses:

HORACE BROWN, A. D. HARRISON

